Facilities not available as advertised

We reserved accommodation at Dikhololo in October 2017 through AnytimeHolidays. The main reasons for selecting the resort: 1.) they were closed to Johannesburg and 2.) had a heated swimming pool, for my grand-mother. This is her annual holiday. On arrival we were told that the heated pool will be closed for the duration of our stay as they decided to do maintenance in September 2017. We were told by one of the other guests at reception they were notified of this via sms. We however were not told of this when making the reservation, we did not receive an sms and their website and that of AnytimeHolidays (management agency) does not reflect this information.

Upon raising our unhappiness with this, we were told, they cant move us to another resort as everything was fully booked and can only provide us a 30% credit to use on our next stay. I'm only able to take leave over the December holiday again and the consultant noted that the 30% will only cover 1 night's accommodation in December (peak season). So our 5 night holiday which we couldn't enjoy has to be compensated by going back to the same bad service for one night in December. When I asked the consultant whether this would be satisfactory to her, she herself admitted no, however management's argument is we should use the other resort facilities. How is a 80 year old grandmother suppose to use: waterslides, trampoline and a jungle gym? Worst holiday experience ever. However, this is know our lost, even though they acknowledge the fault is on their side.